Frequency of data can be represented in several forms, such as a graph or grid of percentages. In any form, the goal is the same: give viewers a bird's-eye look at a data set, and allow them to quickly visualize if there were particular groupings of data within the set, or if certain points appeared significantly more than others. Frequency can be a good method of introducing a data set to an audience or reader before performing more specific statistical analysis, such as finding the mean (mathematical average) or calculating the standard deviation.